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WILLIAM P. ERWIN AND THOMAS A.

DUGDALE, 0F RICHMOND, INDIANA.

Lamm Patent No. 100,275, dated March 1, 1870.

IMPROVED SCHOOL-DESK.

The Schedule referred to in these Letters Patent and making part of the same We, WILLIAM P. ERWIN andTHoMAs A. DUG- DALE, of the city of Richmond, county of Wayne, and State of Indiana, have invented certain Improve-, ments in School-Desks and Seats,of which the fol lowing is a specification.

Nature and Object of the Invention Description of the Accompanying Drawings.

Figure 1 is a perspective view of our school-desk embodying our invention.

Figure 2 is a section of our school-desk cut oft in the middle vertically.

Figure 3 is an end view of our school-desk with the door omitted and the feet oii'.

Figure 4 is a view of a vibrating brace.

Figure 5 is a piece with a flange attached, which' is screwed on to the bottom of the seat, and provided with holes, in which pins are inserted for the purposes of vibrationthere being another similarly constructed piece with the pins reversed.

General Description.

The same letters referto corresponding parts in the several iignres. v l Y A is a board forming the topv of the desk, and hinged to pieces project-ing above the main cud pieces E a su'icient height to admit of the boardA being turned down in front of the back board B.

B isa back board. y L

C is a receptacle nearly vertical for books, which should be made nairowest at .the bottom to be out of the way of the knees.

D is a door atthe end of the receptacle C, ther being a-correspondng door at the other end.

Adoor may also be placed atthe back ot' the receptacle C.

E E" are end pieces, made of cast-iron, with legs cast solid on them.

F is the seat.

v G G" are pieces projecting upward at the top ofthe H I-I" are straps forming part of the hinges T T. .l 1: are vibrating braces.

K is a pin at the bottom end of each of the vibrating braces I.

I l L" are slots in the front legs S S.

M is a pin with which each of the braces I is provided.

N is a hole in the piece that supports the seat, vthere being two of those pieces, as shown at fig. 5,

each piece having a similar hole, in whichv the pins M are inserted.

O is a hole to fit on the pin P, there being a corresponding hole and piu which are not shown.

P is a pin. K

Q Q" are holes to screw the piece on to the seat. f

1t 1t R are screws by which the end pieces E are secured to the back board'B.

S S S S are legs.

T T, hinges. y

T is a flexible substance at the bottom of slots L.

Construction and Operation.'

'The metallic portion may all be made 'of cast-iron, except the screws, which are wrought-iron.

The height and width are made about as other,

school-desks, to suit the size of the children.

The wood-work is .made of ash or walnut lumber y one inch thick, though the receptacle G may be made of thinner lumber than one incli-three-quarters thick will answer-and should be put together' with wood screws. I

By' raising the top board A, it will turn on its hinges T, and may be laid down on and in front of the f back board B, when the seat F may be'tnrned up against it.

The books being inclosed in the receptacle'G, they are out of the way of dust while the operation of sweeping the oor is being performed, whichis not the case with other folding-desks, as we are aware of; and when an audience is seated and thedesk is not required for study, the board A may remain in the position just described in front ofthe back board B.

The iexible piece 'l" is made of gum-elastic.

The seat may be turned down and occupied, when the back of the person seated is supported by the board A, while the board A is out of the way,so that persons may pass without obstruction between the desks and seats.

Weare aware that school-desks have been made to fold out of the way, therefore we do not claim a folding-desk. i

Neither do we claim the brace I in combination with the seat F.

Neither' do we claim the manner of securing the castings to the back board B, as that may be done-by the vibrating brace I, texible `pieces T'", and lseat: any ofthe ordinary means. F, the whole being arranged and operated as above Neither do we caim hinging the top `merely for the described.

purpose of raising. WILLIAM P. ERWIN.

Claim. THOS.r A. DUGDALE. We claim construct-ing a school-desk and seais by Witnesses: means of the folding top A, hinges H, receptacle LEE J. TEMPLETON,

C, end pieces E, .slot L in the front legs 'S,'and 1 JAMES M. HAYE.

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